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BartSMP [9]
3 years ago
10

Which object would best be identified by a periodic Doppler shift in a star's spectrum along with a dip in the stars light inten

sity?
a black hole
a nebula
a comment
a planet
Chemistry
1 answer:
IgorLugansk [536]3 years ago
5 0
The answer would be a planet<span>. Planets revolve around stars, which means there will come a point where the planet is between the star and our field of vision towards the star. This point will be where the star's radiation will have the lowest intensity. As the planet moves, the intensity will change. The effect is comparable to a lunar or solar eclipse.</span>
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A 1.00 L flask is filled with 1.15 g of argon at 25 ∘C. A sample of ethane vapor is added to the same flask until the total pres
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Answer:

The partial pressure of argon in the flask = 71.326 K pa

Explanation:

Volume off the flask = 0.001 m^{3}

Mass of the gas = 1.15 gm = 0.00115 kg

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Gas constant for Argon R = 208.13 \frac{J}{kg k}

From ideal gas equation P V = m RT

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Put all the values in above formula we get

⇒ P = \frac{0.00115}{0.001} × 208.13 × 298

⇒ P = 71.326 K pa

Therefore, the partial pressure of argon in the flask = 71.326 K pa

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